fix(gateway/config): coerce quoted boolean values in config parsing

[Yukipukii1]

Summary

Fixes an edge case where quoted boolean values (e.g. "false") in YAML/dict config were not being normalized correctly for three gateway config fields. Because bool("false") is True in Python, these fields could remain effectively enabled even when the user explicitly wrote "false" in their config.

Bug

Class: invalid bool / config edge-case
Broken behavior: Quoted YAML strings like "false" were treated as truthy for some gateway bool fields.
User impact: A config value written as "false" could still behave as enabled/true.
Affected fields:

PlatformConfig.enabled
SessionResetPolicy.notify
GatewayConfig.always_log_local

Root Cause

The _coerce_bool() helper already existed in gateway/config.py but was not being applied consistently across these three fields.

Fix

Apply the existing _coerce_bool() helper to the three affected fields. No refactor — just consistent use of the helper that was already in place.
Changes in gateway/config.py:

line 138 — SessionResetPolicy.notify now normalizes quoted bool values via _coerce_bool()
line 181 — PlatformConfig.enabled now parses quoted bool values correctly
line 438 — GatewayConfig.always_log_local now parses quoted bool values correctly

Repro

pythonPlatformConfig.from_dict({"enabled": "false"}).enabled # before: truthy, now: False
SessionResetPolicy.from_dict({"notify": "false"}).notify # before: truthy, now: False
GatewayConfig.from_dict({"always_log_local": "false"}).always_log_local # before: truthy, now: False

Tests

Added regression tests covering both the from_dict() path and the config.yaml bridge path in tests/gateway/test_config.py:

line 55 — PlatformConfig.from_dict({"enabled": "false"})
line 147 — SessionResetPolicy.from_dict({"notify": "false"})
line 193 — GatewayConfig.from_dict({"always_log_local": "false"})
line 253 — config.yaml → platforms.api_server.enabled: "false"
line 271 — config.yaml → session_reset.notify: "false"
line 287 — config.yaml → always_log_local: "false"

Result: 33 passed, 20 warnings in 3.37s

[teknium1]

Merged via PR #15387 — your commit was cherry-picked onto current main with your authorship preserved in git log. Thanks for the fix and the thorough repro + tests!